The Treasurer's Office receipts all revenue received by Marion County. The Treasurer controls the flow of money to and from the County and maintains records for the receipt, investment and payment of county funds. The Treasurer maintains bank accounts at various banks as well as the State Treasury Local Government Investment Pool.

The Treasurer is the investment manager for Marion County. Funds are invested in accordance with the County's Investment Policy as well as Oregon Revised Statutes, assuring that adequate cash is available to meet the obligations of the County.